Granted Patent
Utility
US 4,396,254 · App. 06/235,087
f.multidot..theta. Lens
Inventor:
Masato Shibuya
Patented Case
View Patent ↗
Granted: Aug 2, 1983
Filed: Feb 17, 1981
Inventor
Masato Shibuya
Assignee (at issue)
Nippon Kogaku K.K.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.